Titlebook: Second Quantized Approach to Quantum Chemistry; An Elementary Introd Péter R. Surján Textbook 1989 Springer-Verlag Berlin Heidelberg 1989 S

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system. It is intended for those, mainly chemists, who are familiar with traditional quantum chemistry but have not yet become acquainted with second quantization. The treatment is, in part, based on a series of seminars held by the author on the subject. It has been realized that many quantum chem

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Textbook 1989t is intended for those, mainly chemists, who are familiar with traditional quantum chemistry but have not yet become acquainted with second quantization. The treatment is, in part, based on a series of seminars held by the author on the subject. It has been realized that many quantum chemists eithe

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,Advantages of Second Quantization—Illustrative Examples,work. Before turning to the concrete examples, some general remarks are made in order to put the second quantized formalism to its proper place. Some of the following remarks have already been noted before, but it appears to be useful to collect here the most important points.

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Using Spatial Orbitals,ould lead to a 2. = 64-times longer run. The situation is usually worse, since the time requirement of a quantum chemical calculation including the approximate treatment of electron correlation is proportional to the (at least) 6th power of the number of orbitals.

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Some Model Hamiltonians in Second Quantized Form,useful therefore to review the most frequently applied model Hamiltonians. For further reading we refer to the brief monograph by Del Re et al. (1980). A simple description of the semiempirical schemes discussed below, not using second quantization, can be found in Náray et al. (1987).

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